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This Zone Offroad knuckle box kit 1 with upper control arm is a vehicle-specific component for 2019–2023 Chevy and GMC 1500 trucks, compatible with 4- and 6-inch lift setups. The kit centers on a replacement knuckle and includes a matched UCA to work with common lift heights, providing the steering geometry and clearance needed for lifted builds. It’s offered as a direct kit for these model years.
Zone Offroad 19-23 Chevy/GMC 1500 Knuckle Box Kit 1 w/UCA (4in and 6in Compatible)
